on a standardized exam, the scores are normally distributed with a mean of 650 and a standard deviation of…
on a standardized exam, the scores are normally distributed with a mean of 650 and a standard deviation of 20. find the z - score of a person who scored 650 on the exam.
Answer
Explanation:
Step1: Recall z - score formula
The z - score formula is $z=\frac{x-\mu}{\sigma}$, where $x$ is the individual score, $\mu$ is the mean, and $\sigma$ is the standard deviation.
Step2: Identify values
We are given that $x = 650$, $\mu=650$, and $\sigma = 20$.
Step3: Substitute values into formula
$z=\frac{650 - 650}{20}=\frac{0}{20}=0$
Answer:
0